Adjustable mounting bracket for a cylindrical member



FIG. 1 is a front three-quarter perspective view embodying our new design;

FIG. 2 is a top plan view;

FIG. 3 is a front plan view;

FIG. 4 is a side plan view; and,

FIG. 5 is a back plan view.

The broken line showing of a bracket is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an adjustable mounting bracket for a cylindrical member, as shown. 